Phonograph



J. HAJEK.

PHONOGRAPH.

APPLICATION FILED DEC. 15. 1917. v I 1,308,065. Patented July 1, 1919.

5 SHEETSSHEET l.

IWENTOQ L HAJEK.

PHONOGRAPH.

APPLICATION FILED DEC. 15. 1911.

Patented July 1, 1919.v

5 SHEETS-SHEET 2.

J. HAJEK.

PHONOGRAPH. APPLICATION FILED DEC. 15. I917.

Patented July 1, 1919.

5 SHEETS--SHEET 3- INVENTOQ;

J. HAJEK.

PHONOGRAPH.

APPLICATION FILED DEC. 15, 19:1.

Patented July 1, 1919.

5 SHEETSVSHEET 4.

$ "VI I INVEN Tosa. I W W Mgfi J. HAJEK.

PHONOGRAPH.

Patented July 1, 1919. 5 SHEETS-SHEET 5 Has.

A! a) m m w m 5 6 a B O Wk 7 INVENTOQ JOSEPH HAJ'EK, OF EAST PITTSBURGH, PENNSYLVANIA.

PHONOGRAPH.

Specification of Letters Yatent.

Patented uly 1, 1919.

Application filed December 15, 1917. Serial No. 207,334.

To all whom it may concern Be it known that I, JOSEPH HAJEK, a subject of the Emperor of Austria, residing in East Pittsburgh, in the county of Allegheny and State of Pennsylvania, have invented new and useful Improvements in Phonographs, of which the following is a specification.

This invention relates generally to sound reproducing machines or phonographs and has among its objects the production of a machine of this characterfor simultaneously reproducing a plurality of sounds independently recorded upon. a single record strip.

Another object is to provide means for varying the intensity of the simultaneously reproduced sounds.

Still another object resides in the provision of a phonograph using a flexible record strip having a plurality of independent selections, and each selection being so divided that the vocal parts, and the various instrumental parts are all separately recorded but all of which are arranged for synchronous reproduction.

Other objects will be obvious from the description and appended drawings.

\Vith these and other objects in view my invent-ion consists in the novel construction, combination, and relative position of the parts and members shown in the accompanying drawings, hereinafter described, and particularly pointed out in the appended claim.

Referring to the drawing in which like reference characters indicate like or corresponding parts:

Figure 1 is a front elevation of a phonograph structure embodying my invention. Fig. 2 is a cross section taken on line 2-2 of Fig. 1. Fig.3 is an end elevation of the mechanism showing the driving elements looking at Fig. 4 in direction of 3-3. Fig. 4 is a front elevation of the mechanism. Fig. '5 illustrates a cross section taken on line 5-5 of Fig. 4:. Fig. 6 shows a longitudinal section through the record roller.

Fig. 7 illustrates alongitudina'l cross section Referring to the drawings which illustrate a structure embodying my invention, I provide a suitable cabinet 10 which is preferably mounted on rollers 11 and which is provided with a sound emitting longitudinally extending opening 12 located in front of the terminals of the curved sound conveying tone-arms 13.

Between the opening 12 and the terminals of the tone-arn1s 13, I provide a pair of rollers 14 and 15 which are provided with the respective cranks 1 1 and 15 arranged to wind a flexible member 16 of a structure of progressively varying density from one roll onto the other and vice versa. It is thus obvious that I have provided modifying means for varying the sound intensity.

The sound reproducing mechanism is preferably mounted in the center of the cabinet upon the floor 17. On each side of the central mechanism compartment are compart ments provided with doors 18 and 19, available for the storage of the varying sound records.

Suitably mounted on block 20 is an electric motor 21 having a shaft 22 extended on both sides thereof and carrying the rigidly mounted worm gears-23 and 24:. The worm 23 is in mesh with and drives the loosely mounted gear 25 counter-clockwise. This gear 25 is cast with a jaw clutch 26 which when in mesh with the other c06perating half 26 drives the shaft 27 upon which is mounted the solid driving roller 28 having near each end, circumferentially arranged teeth 29 which engage within suitable perforations in the flexible sound record.

thus resist the free rotation of shell 31 upon the spool 32.

The receiving roller 31 is'similar in detail to the record roller 31 except that the shaft 36 in this case has rounded ends and carries only one flat spring 35 so as to have only approximately one-half of the resist ance as that of the record roller 31.' The purpose of this difference in resistance 1s obvious, for as the-record 30 is driven wlth a constant speed by the drive roller 28, and as the record strip unwinds from roller 31, the circumferential speed of such roller 31 must slowly decrease, while as the record is steadily Wound upon roller 31 its circumferential speed increases; therefore w1th ahigher resistance upon the feed roller 31the record will constantly remain taut. The shaft 36 of the receiving. roller 31 is sufiiciently extended to carry the rigidly mounted sprocket 37 which is propelled by a chain drive from the outer double sprocket 38, the inner integral one being propelled by a chain from sprocket 39 which is rigid on shaft 27.

The double sprocket 38 is loosely mounted on impart clockwise motion to the roller 31 anda spindle or pin 40-which is rigid within the upstanding leg of arm 42. It will be-observed that both of the walls 41 are recessed at 41 to permit the removal of the record roll-31 and to afford a slight swinging up- ,ward movement of the roller 31 as will be hereafter explained. Each bearing '34 isloosely mounted within the angularly bent arm 42 which is pivotally mounted upon the extended end o spindle 36. One of the bearings 34 carries a pinion 43 rigidly mounted-upon the pin'extension 34 so asto thus rewind the record thereon. A. heavy spring stop 44-is mounted upon the support 20. and with a finger-like extension 44 noris transmitted to the roller 31 through the engagement of pinion 43 with the underside of gear 43 when'the clutch lever 45 is raised to a position with the spring lock 46 moved with the tooth 46 from notch a to c. The

I upward movement of lever 45 which is rigid with the pivotal shaft projects through the slot 45. It will now 47 will raise the pin 48 which is rigid with the arnr42 and which be observed, that simultaneously with and slightly preceding the engagement of pinion 43 with worm 24, the lower integral extension 45 with its inwardly bent fork 459 will disengage theclutch-half 26 from 26 and thus stop the rotation of the driving roller 28 to permit the reverse movement thereof. It will be noted that shaft 47 ex tends throughto the-opposite side wall 41 I upon which endthereof is an angular meminto intermediate ted.

'pelled by said motor,

ber 49 having a slot 49 engaging the pin 48 ed to the upstanding legs of the arms 42. An

elongated slot 53 is cut into the walls 41 for shaft 52. The reproducers 54 are pivotally supported within the ends of arms 50 and through their movement are engaged or disengaged from the record strip 30. It may now be stated that if the lever 45 be raised osition in engagement with notch 72 all of the reproducers 54 will be raised sufficiently to permit their lateral movement upon the rotation of the thumb nut 55 at the threaded end of shaft 51,

- (shown in Fig. 4) to thus change the selection to be played. It is my desire to provide a single record strip 30 whic will be flexible and which will be coated wit a suitable preparation into which will be cut the recorded sound vibrations ,but in this case, I prefer to separate all voices or instruments so that each reproducer will reproduce the individual sound vibration of either a violin, piano, vocal solo, etc. Thus it is my intention ofrendering more clear and natural reproductions.

The gear 43 is cast rigid with the pinion 24 which is propelled by the worm 24.

I may further say that the thumb nut 55 is preferably made with numerals 56 or characters upon the rim which register with an indicator 57 to indicate the selection to be played.

It is thought that the foregoing dcscri tion and illustrations. clearly disclose t e construction and operation of the invention, hence a more extended explanation is omit- I claim A phonograph comprising a motor, a single flexible record having a plurality of independently recorded sound waves, means for synchronously reproducing said waves, a pair of rollers arranged to receivesaid record in its movementjrom one roller to the other, means for moving said record promeans for reversing the movement of said record, and means for simultaneously laterally shifting said repro ducing mean In witness whereof, I have hereunto sub scribed my name this 8 day of December 1917. v JOSEPH HAJEK. 

